Dr. Luke found out Kesha had texted Lady Gaga alleging he raped another artist, and now he filed legal papers asking a judge to let him add a defamation claim in his legal war with Kesha after he says his team found out she texted Gaga alleging there's another rape victim.

In the papers, Dr. Luke says the text is proof Kesha's on a "malicious campaign to destroy" his reputation and career. BUT the texts he's referring to don't specifically name Dr. Luke but he believes the insinuation is far too clear. #GuiltMuch

Kesha also filed her own legal papers, saying Dr. Luke's got a vendetta against her because he's failed to let her return to work and release new music.